Question

How to declare a RegEx with character repetition to match the strings "http", "htttp", "httttp", etc in Java

Answer 1

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class RegexMatch {
    public static void main(String[] args) {
        // Declare the regex pattern
        String regex = "htt+p";
        Pattern pattern = Pattern.compile(regex);

        // Test strings
        String[] testStrings = {"http", "htttp", "httttp", "httpp", "htp"};

        // Check matches
        for (String test : testStrings) {
            Matcher matcher = pattern.matcher(test);
            System.out.println("Matches \"" + test + "\": " + matcher.matches());
        }
    }
}


// Matches "httpp": True or false, depending on how matches() method works

/*
run:

Matches "http": true
Matches "htttp": true
Matches "httttp": true
Matches "httpp": false
Matches "htp": false

*/

 

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